x86: user_regset_view table fix for ia32 on 64-bit

commit 1f465f4e475454b8bb590846c50a9d16e8046f3d upstream

The user_regset_view table for the 32-bit regsets on the 64-bit build had
the wrong sizes for the FP regsets.  This bug had no user-visible effect
(just on kernel modules using the user_regset interfaces and the like).
But the fix is trivial and risk-free.

Signed-off-by: Roland McGrath <roland@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Signed-off-by: Chris Wright <chrisw@sous-sol.org>

diff --git a/arch/x86/kernel/ptrace.c b/arch/x86/kernel/ptrace.c
index eb92ccbb35026c0d12c26391067df1071536f685..9003e0b03605f23f1c2986fdd9ab8ea5e2125007 100644 (file)
--- a/arch/x86/kernel/ptrace.c
+++ b/arch/x86/kernel/ptrace.c
@@ -1382,6 +1382,9 @@ static const struct user_regset_view user_x86_64_view = {
 #define genregs32_get          genregs_get
 #define genregs32_set          genregs_set
 
+#define user_i387_ia32_struct  user_i387_struct
+#define user32_fxsr_struct     user_fxsr_struct
+
 #endif /* CONFIG_X86_64 */
 
 #if defined CONFIG_X86_32 || defined CONFIG_IA32_EMULATION
@@ -1394,13 +1397,13 @@ static const struct user_regset x86_32_regsets[] = {
        },
        [REGSET_FP] = {
                .core_note_type = NT_PRFPREG,
-               .n = sizeof(struct user_i387_struct) / sizeof(u32),
+               .n = sizeof(struct user_i387_ia32_struct) / sizeof(u32),
                .size = sizeof(u32), .align = sizeof(u32),
                .active = fpregs_active, .get = fpregs_get, .set = fpregs_set
        },
        [REGSET_XFP] = {
                .core_note_type = NT_PRXFPREG,
-               .n = sizeof(struct user_i387_struct) / sizeof(u32),
+               .n = sizeof(struct user32_fxsr_struct) / sizeof(u32),
                .size = sizeof(u32), .align = sizeof(u32),
                .active = xfpregs_active, .get = xfpregs_get, .set = xfpregs_set
        },